<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <button @click='shou'>点击显示文本</button>
        <div v-show='ishou'>
            <button @click='change'>修改</button>{{this.msg}}
        </div>
    </div>
</body>
<script src="./vue.js"></script>
<script>
    const vm=new Vue({
        el:'#app',
        data:{
            ishou:false
        },
        methods:{
            shou(){
                this.ishou=true
                this.msg='你好'
            },
            change(){
                this.msg='好呀'
                console.log(this.msg)
            }
        }

    })
</script>
</html>